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A pressure relief valve contains a poppet with a 4.20 cm^2 area on which system pressure acts. During assembly, a spring with a spring constant of 3200N/cm is installed in the valve to hold the poppet against its seat. The adjustment mechanism is then set so that the spring is initally compressed 0.5 cm from its free-length condition. In order to pass the full pump flow through the valve at the PRV pressure setting, the poppet must move 0.3 cm from its fully closed position. Determine the cracking pressure.
why do you think it is important to control the position of a dc motor? provide two examples for position control of
air at t11300 0r p116 lbfin2 enters a counterflow heat exchanger operating at steady state and exits at p214.7 lbfin2.
Saturated liquid-vapor mixture of water, called wet steam, in a steam line at 2000 kPa is throttled to 100 kPa and 120?C. What is the quality in the steam .
it is proposed to build a 1000mw electric power plant with steam as the working fluid. the condensers are to be cooled
a closed rigid tank contains 5 lbm of a two phase mixture of water initially at 260degf with a quality of 0.6. heat
in europe automotive air conditioners using co2 as a working fluid may replace current equipment based on r134a within
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a refrigerator removes 1.5 kj from the cold space using 1 kj work input. how much energy goes into the kitchen and what
steam having a mass of 3kg and initially at 2.5mpa and 350degc has 2460kj of heat removed at constant temperature until
a 120 lbf 534 n skydiver is free-falling at an altitude of 6500 ft 1980 m. estimate the terminal velocity in mph for
determine the expected rating lives in hours of a 35 mm bore 02 and 03 series straight cylindrical bearings operating
a flow of 2 kgs of saturated liquid r-134a at 200 kpa is mixed with 3 kgs of r-134a at 200 kpa and 10?c. the liquid and
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